Geometry Seminar

 

University of Tor Vergata, Department of Mathematics

25th of March 2025, 14:30-16:00,room D’Antoni

 

 

 

 

 

 

Modular vector bundle on Hyperkahler manifolds

 

Enrico Fatighenti

Università di Bologna

 

 

 

 

We exhibit examples of slope-stable and modular vector bundles on a hyperkähler manifold of \(K3^{[2]}\)-type. These are obtained by performing standard linear algebra constructions on the examples studied by O’Grady of (rigid) modular bundles on the Fano varieties of lines of a general cubic 4-fold and the Debarre-Voisin hyperkähler. Interestingly enough, these constructions are almost never infinitesimally rigid, and more precisely we show how to get (infinitely many) 20 and 40 dimensional families. This is a joint work with Claudio Onorati. Time permitting, I will also present a work in progress with Alessandro D'Andrea and Claudio Onorati on a connection between discriminants of vector bundles on smooth and projective varieties and representation theory of \(\mathrm{GL}(n)\).

 

 

 

 

 

 

 

 

 

 

This talk is part of the activity of the MIUR Excellence Department Projects MathMod@TOV, and the PRIN 2022 Moduli Spaces and Birational Geometry and Prin PNRR 2022 Mathematical Primitives for Post Quantum Digital Signatures